1.

    Which statement BEST describes the role of the Nodes of Ranvier in saltatory conduction?

    A

    They insulate the axon, preventing ion leakage.

    B

    They synthesize neurotransmitters for synaptic transmission.

    C

    They allow for faster action potential propagation by concentrating voltage-gated channels.

    D

    They slow down action potential propagation, allowing for greater control.

    Question Tags
    📚 Subject:Zoology
    📑 Chapter:Neural Control And Coordination
    🎯Topic:Neuron As Structural And Functional Unit Of Neural System
    🎓 Ncert Level:Understanding
    🎯Difficulty :Hard
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :Neuron, Myelin Sheath, Action Potential, Saltatory Conduction

    Related Questions

    1.

    In which of the following, Nissl’s granules are found in?

    A

    Liver cells

    B

    Nerve cells

    C

    Intestinal cells

    D

    Uriniferous tubules

    Question Tags
    📚 Subject:Zoology
    📑 Chapter:Neural Control And Coordination
    🎯Topic:Neuron As Structural And Functional Unit Of Neural System
    🎓 Ncert Level:Remembering
    🎯Difficulty :Medium
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :Cell Biology, Neuron Structure, Nissl Bodies

    2.

    Which of the following neuron is also called excitor neuron?

    A

    Afferent neuron

    B

    Efferent neuron

    C

    Interneuron

    D

    Both (2) and (3)

    Question Tags
    📚 Subject:Zoology
    📑 Chapter:Neural Control And Coordination
    🎯Topic:Neuron As Structural And Functional Unit Of Neural System
    🎓 Ncert Level:Remembering
    🎯Difficulty :Easy
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :Neuron types, Efferent neuron, Afferent neuron, Interneuron, Excitatory neuron

    3.

    A neuron poisoned with tetrodotoxin (TTX) is stimulated. Which of the following would be observed?

    A

    Normal action potential generation

    B

    Delayed action potential generation

    C

    No action potential generated due to blocked Na+Na^+ channels

    D

    Hyperexcitability and spontaneous action potentials

    Question Tags
    📚 Subject:Zoology
    📑 Chapter:Neural Control And Coordination
    🎯Topic:Neuron As Structural And Functional Unit Of Neural System
    🎓 Ncert Level:Application
    🎯Difficulty :Hard
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :Neuron, Action Potential, Ion Channels, Neurotoxins

    4.

    Nissal bodies are mainly composed of

    A

    Free ribosomes and RER

    B

    Proteins and lipids

    C

    Nucleic acids and SER

    D

    DNA and RNA

    Question Tags
    📚 Subject:Zoology
    📑 Chapter:Neural Control And Coordination
    🎯Topic:Neuron As Structural And Functional Unit Of Neural System
    🎓 Ncert Level:Remembering
    🎯Difficulty :Medium
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :Cell Biology, Cellular Structures, Ribosomes, Endoplasmic Reticulum

    5.

    Mark the following statements as true/false and choose the correct option from the codes given below

    I. Neuroglial cells are the packing and supporting cells found in the brain and spinal cord

    II. Oligodendrocytes is a category of glial cells that forms myelin sheaths around the axon

    III. Microglia provides mechanical support to the neurons

    IV. Astrocytes communicate with one another through potassium channels

    Codes

    I II III IV

    A

    True True False False

    B

    False True True False

    C

    False False True True

    D

    True False True False

    Question Tags
    📚 Subject:Zoology
    📑 Chapter:Neural Control And Coordination
    🎯Topic:Neuron As Structural And Functional Unit Of Neural System
    🎓 Ncert Level:Analyzing
    🎯Difficulty :Medium
    ⚡ Time Required :3 mins
    🔄Ncert Concepts :Neuroglial cells, Oligodendrocytes, Myelin sheath, Microglia, Astrocytes, Potassium channels

    6.

    Which statement BEST describes the role of the Nodes of Ranvier in saltatory conduction?

    A

    They insulate the axon, preventing ion leakage.

    B

    They synthesize neurotransmitters for synaptic transmission.

    C

    They allow for faster action potential propagation by concentrating voltage-gated channels.

    D

    They slow down action potential propagation, allowing for greater control.

    Question Tags
    📚 Subject:Zoology
    📑 Chapter:Neural Control And Coordination
    🎯Topic:Neuron As Structural And Functional Unit Of Neural System
    🎓 Ncert Level:Understanding
    🎯Difficulty :Hard
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :Neuron, Myelin Sheath, Action Potential, Saltatory Conduction

    7.

    Neuron is composed of

    A

    Cell body

    B

    Dendrites

    C

    Axon

    D

    All of these

    Question Tags
    📚 Subject:Zoology
    📑 Chapter:Neural Control And Coordination
    🎯Topic:Neuron As Structural And Functional Unit Of Neural System
    🎓 Ncert Level:Remembering
    🎯Difficulty :Easy
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :Neuron structure, Cell biology

    8.

    Which of the following statements are is correct?

    I. Dendrites are long fibre, with branched distal end

    II. Axons are short fibres which arise from the cell body

    III. Cell body of a neuron contains cytoplasm, nucleus with cell organelles and Nissl’s granules

    IV. The dendrites transmits nerve impulses away from the cell body to a synapse

    The correct option is

    A

    Only III

    B

    I and II

    C

    I, II and III

    D

    I, II and IV

    Question Tags
    📚 Subject:Zoology
    📑 Chapter:Neural Control And Coordination
    🎯Topic:Neuron As Structural And Functional Unit Of Neural System
    🎓 Ncert Level:Understanding
    🎯Difficulty :Medium
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :neuron structure, dendrites, axons, cell body, nerve impulse transmission

    9.

    Nerve cells do not possess

    A

    Neurilemma

    B

    Sarcolemma

    C

    Dendrite

    D

    Axon

    Question Tags
    📚 Subject:Zoology
    📑 Chapter:Neural Control And Coordination
    🎯Topic:Neuron As Structural And Functional Unit Of Neural System
    🎓 Ncert Level:Remembering
    🎯Difficulty :Medium
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :Cell Structure, Nerve Cells, Muscle Cells

    10.

    Which part of the neuron is primarily responsible for receiving signals from other neurons?

    A

    Axon

    B

    Dendrites

    C

    Soma

    D

    Synaptic Knob

    Question Tags
    📚 Subject:Zoology
    📑 Chapter:Neural Control And Coordination
    🎯Topic:Neuron As Structural And Functional Unit Of Neural System
    🎓 Ncert Level:Understanding
    🎯Difficulty :Medium
    ⚡ Time Required :0.5 mins
    🔄Ncert Concepts :Neuron Structure, Signal Transmission

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